Screw



FIG. 1 is a perspective view of a screw according to the claimed design;

FIG. 2 is a front elevation view of FIG. 1;

FIG. 3 is a rear elevation view of FIG. 1;

FIG. 4 is a right side view of FIG. 1;

FIG. 5 is a left side view of FIG. 1;

FIG. 6 is a top view of FIG. 1; and,

FIG. 7 is a bottom view of FIG. 1.

The broken line showing of the screw driver in FIG. 1 represents the environment of the claimed design and forms no part thereof. The broken lines shown in FIGS. 2, 3 and 6 represents portions of the screw and form no part of the claimed design. The portions shown between the break lines shown in FIGS. 1-5 form no part of the claimed design. 

CLAIM We claim the ornamental design for a screw, as shown and described. 